Combination trolley wheel and shoe



Oct. 20,1925. 1.55"],913

- A l. WOODRING COMBINATION TROLLEY WHEEL AND SHOE Filed Jan. 5. 1922 .Z'n-uznto-ry A I, Woodring, by

Attorney,

Patented Oct. 20, 1925.

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Application filed January 3, 1922. SeriaLNo, 526,726.

V bly mounted on said head, and one or more removable reversible trolley -shoes also mounted on said head, the trolley-shoes being normally employed for alternate use contactingly on a trolley-wire, and the trolley-wheel being used only at times of backing-up to take the wire then and prevent damage to or tearing down of the wire supports.

Gther objects of said improvements will be more particularly adverted to in detail hereinafter and in the appended claims, it being understood that slight modifications in the structures illustrated herein are nevertheless covered by the principles of the invention and that they are within the scope of its protection.

The objects referred to have been accomplished by the means which are hereinafter described and claimed, and which are illustrated in the accompanying drawings, in which Fig. 1 is a side elevation of my 1mpro-ved combination device, with parts broken away. Fig. 2 is a top plan of the device, and Fig. 3 is a front elevation of the device. Fig. 4 is a side elevation of one of the trolley-shoes of said device, and Fig. 5 is a cross-section of said trolley-shoe.

Similar numerals of reference denote similar parts throughout the several views.

The numeral 9 denotes a trolley-harp of usual form mounted on a trolley-pole, the forks thereof-being connected by a pintle 8, the latter mounted at its ends rockingly in oriliced bearing-seats in said forks. Made rigid with said pintle is a trolley-head 1 positioned between said forks and spaced therefrom, the head 1 being in shape crescental with spaced plates outwardly concave united medially rigidly or integrally at 1 1,

Wheels and Shoes, of whichithe-folto have their opposite. parts above and belofwflspaced fapart-rto receiveand seat remov able reversible like trolley-shoesi2." i

Each shoelQ presents outwardly alongitudinal valleyiortrough toiteceiveiand'selefctrically. contact. with an overhead conductor 18, and -'the trai sver'se I curvature of; this: trough in the median, longitudinal .liliethereof may be arc-u'ate to. fit.= orrcontact with an. arc: ofz-the circumferential surface of-said'l conductor, thus insuring effective electrical contact with a much more certain and complete character than would be the contact of a trolley-wheel 7 such as the one which has its pintle 6 rotatably mounted in forks 5 extending rearwardly medially from the head 1. The shoe 2 has a pair of longitudinally spaced basal lugs 4 having bolt holes 12 to receive bolts 3, the latter traversing opposite spaced parts of the head 1 and secured byv nuts thereto.

The medial forward part of the head 1 is provided with arcuate slots 10 which are concentric with said pintle 8. The harp 9 has bolt holes in its forks to receive the bolt 11 secured by arnut, said bolt also traversing said slot 10. By this means," the rocking movements of the head 1 in said harp are limited.

The uppermost shoe 2 is always used for ordinary traveling contact with the conductor 13, but when worn out, the harp 9 may be turned to place the undermost shoe 2 above, being thus held in reserve until needed. Because ordinarily one end part of the shoe wears away before the other end, the shoe may be removed andreversed, thus doubling its length of usefulness. As these shoes are relatively inexpensive, substitutions are relatively cheaper to make than when trolley wheels are employed.

hen it becomes necessary to move the car backwardly and especially iii certain 10- cations, the trolley-head 1 rocks longitudinally relative to the conductor 13 to be disassociated from the shoe 2, the trolley wheel 7 then receiving the conductor so that there is no disengagement of the trolley from the. conductor which might cause wrecking of the overhead supporting means for the conductor. Forward movement of the car causes the head to rock back, placing the shoe 2 again in contact with the conductor.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is: Y

1. In combination, a trolley-harp, a slidec ontaet device tilt-ably mounted thereon re- I versibly, and a rolling-contact device mounted on said slide-contact device out-of alinement with the slide surface thereof.

2. In combination, a trolley-harp, a trolley-head pivotally mounted thereon, a trolley-wheel mounted rotatably on said head,

and a trolley slide-shoe mounted reversibly on said head.

In combination, a trolley-harp, a tro lley-head pivotally mounted thereon, a tro1- leywhee1 mounted rotatably medially on said head, andlike trolley slide-shoes mounted removably'on opposite ends of said head.

- 4. In combination, a trolley-harp, a trolley-head mounted pivotally thereon and composed of spaced connected housing-elements, a trolley-wheel mounted rotatably and medially on said head between projecting parts thereof, and like reversible slideshoes removably' mounted between opposite 

